very small lightweight pure X11 window manager with tray and menus

JWM is a window manager for the X11 Window System. JWM is written in
C and uses only Xlib and (optionally) the shape extension and libXpm.
It can support some MWM, GNOME, and WM Spec hints. The menu
configuration files are managed in XML format.

Compared to other light WM, like Fvwm95, the Jwm consumes considerably
less memory while providing the same functionality.